Red-eyed creature

From Tardis Wiki, the free Doctor Who reference

The Red-Eyed Creature was an unknown alien lifeform that was accidentally brought to Earth.

Biology

The Creature has two red eyes and is about the size of a small Human. It also has the ability to regenerate from it's wounds

History

The Creature was brought to Earth through the experiments of Erasmus Darkening. It would then take to prowling the grounds of Ashen Hill Manor. It tried to kill Sarah Jane Smith and was in turn wounded by James Marchwood. When Darkening's machine was switched off, the creature was presumabley returned to it's rightful place.(SJA: The Eternity Trap')